JP2001334795A - Rotating retractable writing implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems of safety and of soiling of clothes occurring when a writing implement is carried without retracting a writing unit, that is, problems that the tip of the writing unit may hurt carrier's breast and the inside of a pocket may be soiled by the tip of the writing unit which is serious problem particularly when the ink of the writing unit is of a water-base ballpoint pen or neutral ballpoint pen having quick permeability. SOLUTION: In a rotating retractable writing implement wherein the writing unit arranged in a barrel is extended and retracted by relatively rotating a fore barrel and a hind barrel, a clip to be moved by the relative rotation is attached to at least either the fore barrel or the hind barrel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a front shaft and a rear shaft which are relatively rotatable, and the writing unit can be extended and retracted in the longitudinal direction by the relative rotation of the front shaft and the rear shaft. In a rotating and dispensing writing instrument, a new cam is formed on a clip cylinder and a clip receiving portion formed on the rear of the cam cylinder so that the clip moves by relative rotation between the rear shaft and the front shaft. The present invention relates to a writing pen.

[0002]

2. Description of the Related Art From the viewpoint of safety when carrying and prevention of dirt on clothes, there has been conventionally known a rotary feeding type writing instrument capable of storing a tip portion of a writing unit in a barrel when not writing. One example is Japanese Utility Model Publication No. 3-36488.

[0003]

However, if the writing implement is carried with the cursive writing unit forgotten to be stored, problems arise in terms of safety and prevention of dirt on clothes. That is, the problem is that the end of the cursive unit may damage the chest or stain the inside of the pocket. In particular, when the cursive unit is a water-based ballpoint pen, a neutral ballpoint pen, or the like, contamination of clothes becomes an important problem due to its quick penetration. SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotary dispensing writing instrument that can be carried for the first time when the cursive writing unit is immersed in the barrel.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a rotary-extendable writing implement for retracting a writing unit disposed in a shaft cylinder by relatively rotating a front shaft and a rear shaft. The gist is that a clip that appears and disappears by the relative rotation is attached to at least one of the shaft and the rear shaft.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail based on illustrated embodiments. A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a state in which the cursive unit is housed in the barrel. The barrel 1 comprises a front shaft 2 and a rear shaft 3 and a tip member 16 which is detachably attached to the front end of the front shaft 2 by means such as screwing. Further, a cam cylinder 7 is fixed to the rear portion of the front shaft 2 via a core 13 fixed by means such as press-fitting or bonding by means such as screwing or bonding. On the other hand, a crown stopper 6 is fixed to the rear end of the rear shaft 3, and the rotor 5 is non-rotatably mounted on the crown stopper 6. A cam surface 5a for sliding a writing unit to be described later is formed at the tip of the rotor 5.

A clip receiving portion 8 is formed at the rear of the cam cylinder 7, and the outer shape of the clip receiving portion 8 is substantially elliptical (cam portion 8a). 8a is formed at a position eccentric from the center axis of the barrel 1. The cam cylinder 7 has a hollow shape, and the rotor 5 is provided in the middle of the through hole 7a. The rotator 5 is inserted into the cam cylinder 7 so as to be rotatable with each other but not to move back and forth.
A slider 4 is mounted in the through-hole 7a of the cam cylinder 7 and moves forward and backward in contact with the cam surface 5a of the rotor 5. At the front end of the slider 4, a writing unit 14 that moves back and forth in conjunction with the forward and backward movement of the slider 4 is disposed, and the writing unit 14 includes a front spring such as a coil spring. 15 and is always urged rearward. A cam groove 7b is formed on the side wall of the intermediate portion of the cam cylinder 7, and the protrusion 4a of the slider 4 is slidably fitted therein. Therefore, the slider 4 cannot rotate relative to the rotation of the rotor 5, but moves in the longitudinal direction by the cam surface 5 a of the rotor 5 that rotates together with the rear shaft 3. It is possible.

In this embodiment, the cam surface 5 of the rotor 5
By continuously forming “a” at two line-symmetric positions, for example, when the writing unit 14 protrudes from the state housed in the barrel 1, the rotation direction is not restricted, that is, It may be rotated in the right direction or in the right direction, and the operability is good. As a result, the rotor 5, the cam cylinder 7, the slider 4, the writing unit, etc. It is possible to provide a rotating feed-out writing instrument having excellent durability without imposing an excessive load on components related to rotation and sliding of the writing instrument. By the way, in a writing instrument in which the rotation direction with respect to the rear axis of the front shaft is set, if it is forcibly rotated in the opposite direction to the set direction, the rotor and the cam cylinder will be damaged. In some cases, the cam cylinder and the like may be gradually worn, deformed, and damaged due to long-term misuse (mis-rotation).

A window hole 3a is formed in a wall surface of the rear shaft 3, and a clip unit 9 is disposed in the window hole 3a so as to be able to protrude and retract. The clip unit 9
A clip portion 10 made of a metal material;
The clip support portion 11 has an arc-shaped cross section connected to an upper portion of the clip support portion 0 and a clip tube portion 12 connected to the clip support portion. The clip support 1
The clip tube portion 12 and the clip tube portion 12 are made of a resin material and are integrally formed. An arc-shaped groove is formed at the top of the clip tube portion 12, and the groove portion is bent and formed behind the clip portion 10. The inserted portion 10a is press-fitted and unitized. The clip cylinder 12 of the clip unit 9 is located in the rear shaft 3 and is engaged with a clip receiving portion 8 formed behind the cam cylinder 7. The inner surface shape of the clip tube portion 12 is a cam portion 12 having a substantially elliptical cross section.
a. That is, inside the clip tube portion 12,
The clip receiving portion 8 is located and the clip tube portion 1
The second cam portion 12a and the cam portion 8a of the clip receiving portion 8 can be engaged and slidably contacted.

Further, a front portion of a crown stopper 6 for non-rotatably connecting the rear shaft 3 and the rotor 5 is inserted into a through hole 8b formed in the clip receiving portion 8. When the writing unit 14 is housed in the barrel 1, the clip portion 10 is located at a position furthest away from the axis of the rear shaft 3 (see FIG. 2). 7c is
A projection for allowing the clip unit 9 to protrude and retreat in a stable state, and abuts against the lower surface of the clip support portion 11 of the clip unit 9 so that the clip unit 9 protrudes and retreats parallel to the barrel 1. .

Here, the rear shaft 3 and the front shaft 2 are relatively rotated from the state shown in FIG. 1 (FIG. 2) (the state in which the writing unit 14 is stored and the clip unit 9 is protruded). Then, the rear shaft 3 and the clip unit 9 and the rotor 5 connected to the rear shaft 3 rotate relative to the front shaft 2. Here, since the cam portion 8a of the clip receiving (stopping) portion 8 is located at an eccentric position with respect to the barrel 1, the clip portion 10 is rotated by the rotation operation.
It moves inward and eventually is positioned at the position closest to the axis of the rear shaft 3 (see FIG. 5). In addition, the rotor 5 moves the slider 4 forward by the rotation operation. Then, by moving the slider 4 forward,
The cursive writing unit 14 moves forward against the resilience of the front spring 15, and its tip projects from the tip of the tip member 16. In this way, by synchronizing the immersion operation of the clip unit 9 and the projecting operation of the cursive unit 14, the cursive unit 14 can be operated in a state where the clip unit 9 cannot function.
Can protrude from the barrel 1.

A second embodiment will be described with reference to FIGS. The barrel 17 of the present embodiment also includes a front shaft 18, a rear shaft 19, and a tip member 32, as in the previous embodiment, and a handwriting unit 30 such as a ball-point pen is housed in the barrel 1. In addition, the clip unit 2 which appears and retracts with respect to the rear shaft 19
Reference numeral 5 denotes a clip portion 26 made of a metal material and a clip tube portion 28 made of resin. Behind the clip part 26, a bent and formed insertion part 26a
Is press-fitted into an arc-shaped groove formed at the top of the substantially elliptical clip tube portion 28. A clip support portion 27 is formed on a side surface of the cam cylinder 23 attached to the front shaft 18 via the core 29 and at a position synchronized with the cam portion 24a of the clip receiving portion 24. When the body unit 30 is housed in the barrel 17, the clip support portion 27 supports the ball portion 26b of the clip portion 26 (see FIG. 6).

Here, when it is desired to make the cursive writing unit 30 protrude, the front shaft 18 and the rear shaft 19 are relatively rotated. By this rotation operation, the clip unit 25 is housed in the rear shaft 19 and the clip ball 26 b of the clip 26 is inserted into the window 2 formed in the cam cylinder 23.
Immerse yourself in 3c. At this time, the clip unit 25
Is located closest to the axis of the shaft cylinder 17. The window hole 23c is formed at a position opposite to the clip supporting portion 27 (a position rotated by 180 degrees). In this embodiment, since the clip support portion 27 is integrally formed on the side surface of the cam cylinder, the clip unit 2 is compared with the case where the clip support portion is formed in the clip unit (the first embodiment).
5 can be increased by the thickness of the clip supporting portion in the axial direction of the shaft (projection amount).
Since the clip ball portion 26b can be stored in the window hole 23c, the moving amount of the clip unit can be further increased. Since the operation of the cursive unit is similar to that of the first embodiment, the description is omitted.

A third embodiment will be described with reference to FIG. A cam 45b is formed on the front end surface of the clip receiving portion 45 of the cam cylinder 40 of the present embodiment, and is inclined toward the longitudinal direction of the shaft cylinder. Also, a cam 4 inclined toward the longitudinal direction of the shaft cylinder is provided on the rear end surface of the clip cylinder portion 41 of the clip unit 42.
1b is formed and is in contact with the cam 45b of the clip receiving portion 45. Further, a cam spring 51 such as a coil spring is formed in front of the clip tube portion 51, and constantly biases the clip unit 42 rearward. The shaft cylinder 34 includes a front shaft 35, a rear shaft 36, and a front member 49 as in the above-described example.
6, a window 36c through which the clip cylinder 41 of the clip unit 42 moves back and forth, and a flat portion 36b in front of the window 36c.

As can be seen from the above configuration, in this embodiment, when the front shaft 35 and the rear shaft 36 are relatively rotated, the clip unit 42 moves in the longitudinal direction of the barrel 34. More specifically, when the front shaft 35 and the rear shaft 36 are relatively rotated from the state in which the clip unit 42 is in the immersed state (see FIG. 9), the cam 45b of the cam cylinder 40 advances the cam 41b of the clip cylinder 41. As a result, as a result, the clip unit 42 moves forward. In the process of moving the clip unit 42 forward, the ball portion 43b of the clip portion 43 slides on the flat portion 36b, and eventually,
While the clip 43 is elastically deformed, the ball portion 43b is positioned on the clip support portion 36c of the rear shaft 36 such that the ball portion 43b climbs from the flat portion 36b. After such an operation, the clip 43 functions.

A fourth embodiment will be described with reference to FIGS.
Since this is a modification of the third embodiment, the description of the same configuration will be omitted. The clip cylinder portion 63 is formed with a cam portion having a substantially elliptical cross section similar to that of the first embodiment, and a cam inclined in the axial direction. On the other hand, the clip receiving portion 59 formed behind the cam cylinder 58 is also formed with a cam portion having a substantially elliptical cross section and a cam inclined in the longitudinal direction of the shaft. A concave portion 62 for accommodating the ball portion 61b of the clip portion 61 is formed on the wall surface of the rear shaft 54. Here, the clip portion 61 is connected to the barrel 5 when the writing unit 65 is housed in the barrel 52.
It is located at the position furthest away from the axis 2 and at the position most advanced in the longitudinal direction. On the other hand, when the cursive writing unit 65 is protruded from the barrel 52, the clip portion 61 is located closest to the axis of the barrel 52,
In addition, it is positioned at the most retracted position in the longitudinal direction.
That is, in this embodiment, the clip unit is moved up (down).
While moving in the longitudinal direction. That is, by synchronizing the projecting operation of the clip unit and the immersion operation of the writing unit into the barrel, when the writing unit is housed in the barrel, the ball portion 61b formed at the tip of the clip.
Are raised from the concave portion 62 of the rear shaft, and the clip functions (see FIG. 12).

In addition to the above-described embodiment, various means for moving the clip and the cursive unit protruding and retracting from the barrel are conceivable. For example, a flat surface may be partially formed on the cam surface of the rotor that slides the writing unit, and the clip may be moved by rotation when the slider is in contact with the flat surface. . In this case, the clip unit does not move when the cursive unit is accommodated in the barrel, but only when the rear shaft is further turned, the clip unit moves for the first time, so that the clip function is performed. It is possible to more reliably prevent the clothes from being stained due to the unit jumping out.

[0017]

According to the present invention, there is provided a rotary-extendable writing implement for retracting a writing unit disposed in a barrel by relatively rotating a front shaft and a rear shaft. In at least one of the above, the clip which comes and goes by the relative rotation is attached, so that the form becomes possible only when the writing unit is immersed, thereby improving the safety and also causing the writing unit to inadvertently pop out. It is possible to prevent clothes from being stained.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of a cursive writing unit stored state in a first embodiment.

FIG. 2 is a cross-sectional view taken along the line A-A 'of FIG.

FIG. 3 is an exploded perspective view of main components in the first embodiment.

FIG. 4 is a longitudinal sectional view of the cursive writing unit projecting state in the first embodiment.

FIG. 5 is a cross-sectional view taken along the line B-B ′ of FIG. 4;

FIG. 6 is a vertical cross-sectional view of the cursive writing unit stored state in the second embodiment.

FIG. 7 is a longitudinal sectional view of a cursive unit protruding state in the second embodiment.

FIG. 8 is an exploded perspective view of main parts in the second embodiment.

FIG. 9 is a longitudinal sectional view of the cursive writing unit stored state in the third embodiment.

FIG. 10 is a vertical cross-sectional view of a cursive unit protruding state in the third embodiment.

FIG. 11 is a partial cross-sectional perspective view of a main part of the third embodiment in a state where the cursive writing unit is stored.

FIG. 12 is a vertical sectional view of a cursive unit stored in a fourth embodiment.

FIG. 13 is a longitudinal sectional view of the cursive writing unit projecting state in the fourth embodiment.

[Explanation of symbols]

 1 17 34 52 Shaft tube (front shaft, rear shaft, front member) 2 18 35 53 Front shaft 3 19 36 54 Rear shaft 3a Window hole 36b Rear shaft flat portion 4 20 37 55 Slider 4a 20a 37a Slider protrusion 5 21 38 56 Rotor 5a 21a Cam surface 6 22 39 Crown cap 723 40 58 Cam tube 7a Through hole 7b 23b Cam groove 7c Cam tube protrusion 23c Cam tube window hole 8 24 41 59 Clip receiving portion 8a 41b Cam portion 8b Through hole 925 42 60 Clip unit 10 26 43 61 Clip section 10a 26a 43a Insert section 10b 26b 43b 61b Ball section 11 27 36c Clip support section 12 28 45 63 Clip cylinder section 12a 45b Cam surface 13 2946 64 Core 14 30 47 65 Cursive unit 15 31 48 66 Front spring 163 49 67 destination member 17 33 50 68 Atamakanmuri 44 57 Kamubane received 51 69 Kamubane 62 recess

Claims (4)

[Claims] 1. A rotary dispensing type writing instrument for retracting a writing unit disposed in a shaft cylinder by rotating a front shaft and a rear shaft relatively, wherein at least one of the front shaft and the rear shaft is provided. And a clip that appears and disappears due to the relative rotation. 2. The rotary dispensing writing instrument according to claim 1, wherein a clip is arranged on the rear shaft,
A cam portion is formed at the base of the clip, and a cam member is also arranged at the front shaft, and the clip is protruded and retracted from the rear shaft by engagement of the cam member with the cam portion of the clip. Rotary feeding type writing implement characterized by the following. 3. The rotary dispensing writing instrument according to claim 2, wherein the cam portion and the cam member of the clip radially engage with the cam portion surface and the cam which engages with the longitudinal direction of the shaft cylinder. A rotary dispensing type writing instrument characterized by forming a part. 4. The rotary dispensing type writing instrument according to claim 1, wherein an operation of retracting and retracting the clip and an operation of retracting a writing unit are synchronized. Writing implement.